Abstract: The growing demand for new energy electric vehicles（EVs）has further boosted the demand for

electric car charging. However，the gap between operating companies results in that the information of charging piles cannot be fully and effectively presented to the demanding public.Aiming at the above problems，a new intelligent EV charging system based on alliance block chain was introduced. Firstly，the system was tamper-proof and multicentralized through the alliance block chain. Then，a bio-objective mixed-integer programming model（BOMILP）was proposed to balance the interests between enterprises and electric vehicle users. A limited neighborhood search method with memory（LNSM）algorithm supporting the implementation of smart contract was introduced to further improve the speed and performance of smart contract. Finally，the charging data of electric vehicles in Tianjin area was taken as an example to verify the proposed system，the results show that the method is feasible.

      Key words: new energy ；block chain ；limited neighborhood search method with memory（LNSM）；bioobjective mixed-integer programming model（BOMILP）；intelligent contract